2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55083A renormalized perturbative expansion of interacting quantum fields on a globally hyperbolic spacetime is performed by adapting the Bogoliubov Epstein Glaser method to a curved background. The results heavily rely on techniques from microlocal analysis, in particular on Radzikowski's characterization of Hadamard states by wave front sets of Wightman functions.6 pages, latex, contribution to the Proceedings of the ICMP Brisbane 1997High Energy Physics - Theorytext